150 pieces KIT CONTENTS: Flat Head Countersunk: M3x6, M3x8, M3x10, M4x10, M4x20, 6-32x3/8 Regular Socket Cap: M3x6, M3x8, M3x10, M3x12, M3x14, M3x16, M3x18, M3x20, M4x12, M4x25 Special Feature Includes substitution for M3.5 screws using 6-32 standard size.